[CH3:1][C:2]([C:8]1[CH:13]=[CH:12][C:11]([O:14][CH3:15])=[CH:10][CH:9]=1)([CH3:7])[CH:3]=[C:4](Br)Br.Cl[C:17]([O:19][CH3:20])=[O:18].CC(C1C=CC(OC)=CC=1)(C)C#CC>>[CH3:1][C:2]([C:8]1[CH:13]=[CH:12][C:11]([O:14][CH3:15])=[CH:10][CH:9]=1)([CH3:7])[C:3]#[C:4][C:17]([O:19][CH3:20])=[O:18]This compound was prepared from Compound 53 and ClCO2Me in the same manner of Compound 54.
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